FI112106B - Puuristikkorakenne - Google Patents

Description

Wooden grid structure 112106

The invention relates to a method for manufacturing a wooden lattice structure according to the preamble of claim 1.

The invention also relates to a wooden lattice structure according to the preamble of claim 9.

As load-bearing structures of buildings, pillars and especially roof supports, wooden truss structures are commonly used. The lattice structures can be traditionally handmade on site or in a factory specialized in the production of lattice structures. 10 Handcrafted wooden trusses are made by joining parts of the grid, top and bottom bars, vertical bars and diagonal bars, with nail or screw connections.

In prefabricated wooden trusses, vertical and diagonal rods are connected to the chord by means of nail plates. Attachment of the rods to the chords is accomplished by clamping the nail plate to the point of attachment of the rods by means of a hydraulic or mechanical clamp so that the same nail plate engages all the rods joining at the point of connection. Usually two identical nail plates are always used at the joint, which are placed at the joint on both sides of the grid. If the truss rods consist of two parallel wooden rods, a double-sided nail plate may also be used at the joint. In this case, the nail plate is placed at the junction of the rods between the parallel wooden rods:: then the parallel wooden rods are clamped together by a hydraulic or • mechanical clamp. Most of the trusses currently used in building construction are prefabricated nail plate trusses. Under good factory conditions and: Under strict quality control, the lattices are of quality and dimensional accuracy; : delta very good. Thanks to the use of strength-graded timber, accurate computer-based sizing techniques and efficient industrial manufacturing, the cost of manufacturing nail plate trusses is low.

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Also known is the method of joining wooden rods, so-called. Greim nail joint system with wood; ; the rods are joined together by means of metal plates. In this connection system ··. one or more grooves are machined at the ends of the pieces of wood to be joined, and a metal plate extending over the joint is inserted into each groove '·' 30. The pieces of wood to be joined are fixed ': ·' by nailing nails or drilling screws into the piece of wood to be joined •.,. · Through the end portion such that nails or screws pierce the metal plates in the grooves.

112106 2

CH-640591 discloses a wooden lattice structure in which the said Greim-nail joining system is applied at the junction of the diagonal bars and sticks of the lattice. The metal plate is placed at the joint at the center of the truss of the grid and in the groove at the ends of the diagonal rods so that the same metal plate extends inside the rods at the joint. After the plate has been installed, a screw extending through the metal plate has been drilled through the ends of the diagonal rods and the barbell rod on both sides of the rod. By increasing the thickness of the metal sheets, very durable joints can be made, which are particularly well suited for joining massive lattice rods.

10 On-site lattice manufacturing is nowadays quite rare. Joining the rods by nailing or screwing is slow handmade, thus increasing the cost of manufacturing the lattice. Handcrafted lattices are nowadays mostly used only in some detached or farm buildings where the builder can use his own timber.

15 The use of nail plate trusses in large buildings is limited by the size of the trusses. The production lines of the Ris dip factories are generally constructed for the construction of relatively short trusses, usually up to 20-25 meters in length. Production of lattice structures larger than this would require the modernization of production machinery and production facilities. In addition, nail plate joining technology is best suited for joining relatively thin pieces of wood 20. Since grids of large tension would require the use of '· 1 stiff chords and rods, it is difficult to produce them using this technique. Transporting large grids from the factory to the site may also require • expensive specialized equipment, which would increase the overall cost of grid delivery.

[Greim nail joints have the drawback of their high price of 25. This jointing technique also loses some of the bearing capacity of the joint and the other structure because the compression capacity of the joint is lower than pure butt joint. The joining technique involves many hand-crafted steps, such as sawing grooves in wood, inserting a metal plate into the grooves, and finally nailing nails * ... · or drilling screws, which increases the cost of fabricating the lattice. This ankle joint is thus generally used only in large lattice structures to which the other joint laces are attached. * · *, Ankles not suitable.

: Previously known from Swiss Patent Publication CH-517876; : a pretty one made up of two or more support members, which in turn are joined together by the main pillar. In particular, the auxiliary arms of the support members are attached to the main arch. The main bar is shown to be extended with finger joints and the auxiliary bar with slabs at various points along the longitudinal direction of the beams.

Wooden grid structures which can be assembled from parallel parts by connecting plates, such as nail plates, are known from the Finnish patent publication FI-23678 and from the German patent application DE-1023577.

The object of the invention is to eliminate the drawbacks associated with the above wood structures. It is also an object of the invention to provide a new method of fabricating a wooden grid 10 and a new wooden grid structure.

The method of making a wooden lattice structure according to the invention is characterized in what is set forth in claim 1.

The wooden lattice structure according to the invention is characterized in what is set forth in claim 9.

Advantageous embodiments of the invention are set forth in the dependent claims.

The basic idea of the invention is to first produce, for example, using known nail plate jointing technology, parts of lattice structures which are joined together to form a complete structure at the construction site by another so-called jointing technique known per se. By applying the Greim 20 nail joining technique. In the invention, a plurality of parallel grid elements · are joined together with other parallel grid elements * ·. ' : by joining the joint plates between the sections of the lattice and securing the sections and the joint plate to each other by means of fastening means. The attachment is preferably accomplished by nailing the nails or drilling the screws through all the parallel rods and the connecting plates between them.

The method of making the lattice structure and the lattice structure according to the invention provides several advantages, which are described below.

The invention allows nail plate joining technology to be used in grid sizes where it has not previously been possible. Grid factories can provide exactly the size of grid parts that are best suited to the production technology of each; Γ: - and mounting devices; " '; toon. Manufacturers of nail plate trusses will thus be able to offer their products to sites that have previously used heavy-duty wooden trusses or steel trusses made by other joining techniques.

112106 4

The invention can also be used to optimize the utilization of wood material. In the invention, several lattices are mounted side by side, whereby any material defects in a single lattice are not so significant to the overall strength of the structure. Thus, increased strength-5 values can be safely applied to the wood material. When parallel-mounted lattice clamping rods are attached to each other, the buckling resistance of the rods is increased and no separate buckling brackets are required. When designing trusses, site-to-site joints can be designed where they can be implemented as economically as possible.

Furthermore, the wooden grid structure according to the invention is fire safe. In the invention, the metal joints used to interconnect the portions of the grid 10 are hidden between the truss rods, so that they are not exposed to fire in the event of a fire. Also, most lattice nail plate joints are automatically fire protected when several lattices are placed side by side.

Further, the wooden lattice structure according to the invention can be applied in a number of different structural solutions. In addition to joining the components of the roof supports, the same technique can be used, for example, to implement the connection between the roof support and the pillar. The invention is thus also applicable to the manufacture of circumferential structures.

In the following, the invention will be described in detail with reference to the accompanying drawing, in which Figures 1a and Ib illustrate, by way of example, a wooden lattice structure according to the invention, viewed from the side and from the top respectively; Fig. 2 is a side elevational view of a subset; Fig. 3 shows, by way of example, a top view of one of the joints of the sub-grids of the wooden grid structure according to the invention; Fig. 4 shows, by way of example, a top view of a second junction of the sub-trusses of a wooden truss structure according to the invention; 30 '· ·. Fig. 5 shows, by way of example, a third plan view of a third junction of the trusses according to the invention in partial view. ' · ·. na sectional view;

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112106 Fig. 6 is a side elevational view, M-M, of a cross-sectional view of a junction of sub-lattices of a lattice structure; Fig. 7 shows, by way of example, another wooden frame structure according to the invention, in particular a peripheral structure consisting of a pillar section and a roof support section; Fig. 8 shows, by way of example, a third wooden structure of the invention, in particular a perimeter structure consisting of a pillar section and a roof support section; and FIG. 9 schematically shows a joint G of the lattice structure of FIG. 4.

Figures 1a and Ib show a wooden lattice structure according to the invention, viewed from the side of the lattice. The lattice structure is a conventional roof lattice having in this case three interconnected sub-structures 100, 200, 300. Each sub-structure 100, 200, 300 consists of at least two, in this case 15, three parallel sub-lattices 100a, 100b, 100c, 200a, 200b, 200c, 300a, 300b, 300c. Partial lattices, such as the first lattice 100a in Fig. 2, are preferably discrete parts made by the known nail plate lattice fabrication technique, including the necessary number of nail plates 104a attached to each other. rods 101a, 102a, 103a of wood material. The component structures 100, 200 and 20 300 are joined to one of the lattice rod junctions A, B, C, * 'D, E and F shown in Fig. 1 to form a complete lattice structure 1.

The wooden lattice structure of Figures 1a and Ib consists of three sub-structures 100, 200 and 300 formed by dividing an entire wooden lattice structure 1 into sections. following the dividing lines X, Y. The number of sub-structures is by no means limited to 25. The lattice structure is also equally feasible for two ... sub-structures or more than three sub-structures, and the dividing lines need not be vertical as shown in Figure 1a.

. /. Figure 3 is a top view of the junction A of the sub-structures 100, 200 of the lattice structure of Figure 1a. Each of the subassemblies 100, 200 has a plurality of 'F 30 ko similar parallel subnets 100a, 100b, 100c; 200a, 200b, 200c. At vest / position A, the sub-grids 100a, 100b, 100c of the first sub-structure 100 are interconnected with the first sub-structures 200a, 200b, 200c of the second sub-structure 200 with the first splices 201a, 201b, 201c. A first extension of the first lattices 101a, 101b, 101c of the lattice members of the various subassemblies 100, 200; In this case, the ends 201a, 201b, 201c are positioned as butt joints in the same cross-sectional plane. The joining is accomplished by installing a plurality of joining plates 3a, 3b on the joint A, such that each joint plate is fitted between parallel joints 5 at the joint, in particular the slots 5a, 5b therebetween.

The connecting plates 3a and 3b are of such a size that they extend in the direction of the first rods 101a, 101b and 101c to be connected in a single plate in the slots 5a, 5b between the rods and into the slots 6a, 6b between the second rods 201a, 201b and 201c. Attachable extension rods 101a, 101b, 101c and 201a, 201b, 201c are secured to the connecting plates 3a, 3b by fitting metal rod-shaped fastening members 4, such as nails or screws, to pass through the end regions of the first and second extension rods 101a, 101b. The connecting plates 3a, 3b extending from the slots 5a and 5b between the slots 5a and 5b to the slots 6a and 6b between the other joints 201a, 201b come from the ends of the fastening members 4 to 15 at each end.

Figure 4 shows another preferred embodiment of the connection point A as seen from above the connection point. In this case, grooves 7a, 7b and 8a, 8b of substantially thickness of the connecting plates 3a, 3b have been machined into the end regions of the first splice bars 101a, 101b and second splice bars 201a, 201b. Hereby, the parallel sub-grids 100a, 100b, 100c and the corresponding parallel extension rods 101a, · '101b, 101c can be placed and secured tightly against each other.

•: Figure 5 shows a third preferred embodiment from the junction A above! photographed. Each sub-structure 100, 200 of the wooden lattice structure has a plurality of parallel sub-lattices 100a, 100b, 100c; 200a, 200b, 200c. At junction A en-25, the first extension rods 100a, 100b, 100c of the first sub-assembly 100 of the first sub-assembly 100 are joined with the first extension members 211a, 211b, 211c of the second sub-assembly 200 such that * · »• the ends of the joints overlap with each other. In this case, the ends of the parallel bars: the lilac, 11 lb and 21 lb, 21 lb of the extension rods are suitably predetermined overlap, 30 spaced a, so that the extension rods of the first sub-lattice extend !!! partly to another sub-grid and vice versa. Junction A spreads overlapping; '' In the area defined by the causative a in the longitudinal direction of the joints and consists of parallel joints A1, A2, A3 of the joints. The interconnection is accomplished by installing at least one connector plate 3a, 3b at connection point A at connection 35 for each partial connection point A1, A2, A3. Each joint plate 3a, 3b is adapted to pass over each butt joint A1, A2, A3 and is secured at the joint between the extension joints which are placed parallel to each other, in particular the slots 5a, 5b therebetween; 6a, 6b, in principle in the same manner as described above with metal rod-like fastening members 4, such as nails or screws.

In one embodiment of Fig. 5, the connecting plate 3a is so long that it passes over the two partial joining points A1, A2 in the slot 5a, 6a.

Figure 6 illustrates a partial section M-M of both the embodiment of Figure 3 and Figure 5.

The number of connecting plates 3a, 3b is preferably selected such that at least one connecting plate is provided between each of the joining joints 101a, 101b, 101c and 201a, 201b and 201c. 10 However, the number of bonding plates used depends ultimately on the stresses exerted on the joint. If necessary, more than one joint plate may be mounted in parallel or side by side between the joints to be joined, or a gap between the joints may be left without the joint plate. In addition, the joint plate 3c, 3d can be attached not only to the slots 5a, 5b, 6a, 6b but also to the joint A; A1, 15 A3 and the outer surface of the joints as illustrated in Figure 5.

Figures 3 and 4 show partial lattices 100a, 100b, 100c; 200a, 200b, 200c of extension rods 101a, 101b, 101c; Connection of 201a, 201b and 201c at junction A. The same principle applies to all other junctions ···: at junctions 100a, 100b, 100c, 200a, 200b, 200c and 300a, 300b, 300c, ie at points B in Figure 1 , C, D, E and F.

ft '' ϊ To facilitate and facilitate installation work, similar parallel grids 100a, 100b 100c and 200a, 200b, 200c and 300a, 300b, 300c can be · assembled into prefabricated sub-structures 100, 200, 300 already at the factory by attaching parallel::: screwing. Similarly, the connection plates 3a, 3b entering the joints A, 25 B, C, D, E and F can be pre-installed. Pre-I '·': as an indication at the joint A, the joint plates 3a, 3b can be pre-secured with the joint. ···. slots 5a and 5b or notches 7a and 7b. The junction is • finished at the building site where the junction plates 3a and 3b are inserted into the slots 6a and 6b or joints 8a and 8b between the rods 201a, 201b and 201c and secured by the connecting members 4.

Figures 3 and 4 show, respectively, first and second sub-grids 100a, 100b '··' 100c; 200a, 200b, 200c first extension rods 101a, 101b, 101c; 201a, 201b, 201c are drawn to illustrate the image slightly apart. In the actual structure, the extension rods are clamped tightly together and the connecting plates 3a, 3b remain trapped between the rods. It is preferable to select the width of the joint plate so that the joint plate is as wide or narrower than the width of the joints to be joined. In this way, the joining boards are surrounded by wood material on both sides and are thus protected from fire. If necessary, the fire protection of the connecting plates 3a, 3b may be further improved by covering the gaps 5a, 5b and 6a, 6b between the parallel joints with one or more wooden strips 11 as illustrated in broken lines in Figure 3. In this way, the edges of the joint plates are also protected against fire.

Figs. 7 and 8 show some preferred embodiments of the wooden lattice structure 12 and 13 according to the invention, wherein the interconnected sub-structures form a circular structure 10. In the figures, like parts have been used with reference numerals. At least two, in this case, three parallel sub-grids 400a, 400b, 400c form a first sub-structure, i.e. a roof bracket portion 400, and at least two, in this case three, parallel sub-grids 500a, 500b, 500c form a second sub-structure or pillar portion 500. the structure is in principle similar to that described above in connection with the roof lattice, as in Figures 1a and Ib. The roof bracket portion 400 and pillar portion 500 of the lattice structure 12 are joined at mutually terminating ends at junctions G, H, I, respectively, the roof bracket 400 and pillar portion 500 of the lattice structure 13 are joined by their mutually facing end portions 13 and K to 20.

Fig. 9 shows, by way of example, an illustration of the positioning of the connecting plates 3a, 3b at the joint G in Fig. 7, where the first extension joints 501a, 501b and 501c of the column members 500a, 501b and 501c are interconnected. 25 for the first splice rods 400a, 400b, 400c of the carrier section 400; 401a, 401b and 401c. 7, 8, all of the junctions G, H, I, K and L shown in FIGS. 7 and 8 are implemented using the embodiment of junction A shown in FIGS. 3 and 4. junction; . '. In G, the connecting plates 3a, 3b are placed on the first splice bars 501a, 501b, 501c, * ·, and 401a, 401b, 401c. slots 9a, 9b and 10a, 10b, respectively, and the fastening members 30 '4 are arranged to pass through the end joints of the first joints and the connecting plates 3a, 3b.

The invention can be applied in many different ways. For example, by the method of preparation of * ;;; All interconnected sub-grids of the lattice structures need not necessarily be nail plate lattices, as illustrated in Figure 2. Alternatively, in the circumferential structures of Figs. 7 and 8, the pillar portion 500 is formed, for example, of co-located pillars or lumber pillars.

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The connection plates 3a, 3b are made of metal, preferably steel or aluminum, and generally rectangular plate elements. The joint plates may also have other forms, such as polygons and / or plate elements with at least partially curved edges. The shape of the connecting plates is most preferably determined by the application 5. The thickness of the joint plates is also determined by the application and the calculated stresses. The thickness of the connecting plates made of steel is, for example, 1-5 mm.

The connection plates 3a, 3b can also be made of other material. One advantageous alternative is plywood, although high strength and stress resistance are required. The thickness of the usable plywood material is greater than that of the metal joints, preferably 12 mm or more.

It is possible to use connecting plates made of different materials at the same connection point of the wooden structure.

Some of the preferred embodiments of the wooden lattice structure according to the invention have been described above. The invention is not limited to the solutions just described, but the inventive concept can be applied in numerous ways within the scope of the protection requirements.

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Claims (21)

112106 A method for producing a lattice lattice structure, wherein the lattice lattice structure (1; 12, 13) is implemented as sub-structures (100, 200, 300; 400, 500) which are in turn implemented as parallel sub lattices (100a, 100b, 100c, 200a, 200b, 5200c). , 300a, 300b, 300c; 400a, 400b, 400c, 500a, 500b, 500c), characterized in that the subassemblies (100, 200, 300; 400, 500) are interconnected to form a single lattice structure (1; 12, 13). junctions (A, B, C, D, E, F; G, H, I; K, L) with junction plates (3a, 3b) arranged in parallel sub-grids (100a, 100b, 100c; 400a, 400b, 400c, 500a, 500b, 500c) and fixed to them. A method for manufacturing a wooden lattice structure according to claim 1, characterized in that the method: - the part structures (100, 200, 300; 400, 500) are made of wood material such that they consist of at least two parallel sub lattices (100a, 100b, 100c, 200a, 15 200b). , 200c, 300a, 300b, 300c; 400a, 400b, 400c, 500a, 500b, 500c), which includes: joints (101a, 101b, 101c, 201a, 201b, 201c; 401a, 401b, 401c, 501a, 501b, 501c),. · '- the joining plates (3a, 3b) are fitted to the joints (A, B, C, D, E, F; G, H, I; K, L) of parallel sub-lattices (100a, 100b, 100c, 200a); , 200b, 200c, 300a, 300b, 300c; 400a, '· *: 20 400b, 400c, 500a, 500b, 500c) for the extension joints (101a, 101b, 101c, 201a, 201b, 201c; • · · v ·' 401a, 401b, 401c, 501a, 501b, 501c), extending from the part structure:,:: (100; 400) to one of the other (200; 500) and - the connecting plates (3a, 3b) are secured to the extension rods (101a, 101b, 101c) , 201a, 201b, 201c; 401a, 401b, 401c, 501a, 501b, 501c) with metals. · ". 25 with fastening means (4). Method according to claim 1 or 2, characterized in that at the joining point (A), the first longitudinal rods (lila, 111b, 111c) of the sub-grids (100a, 100b, 100c) of the first sub-structure (100) are joined together by the second the subassembly • '' (200) with the first joints (211a, 211b, 30 211c) of the sub-lattices (200a, 200b, 200c) such that the end portions of the joints overlap with each other. Method according to Claim 1, 2 or 3, characterized in that the connecting plates (3a, 3b) are arranged in parallel sub-grids (100a, 100b, 100c, 200a, 200b, 200c, 300a, 300b, 300c; 400a, 400b, 400c). , 500a, 500b, 500c), especially the joints (5a, 5b; 6a, 6b) between the joints (101a, 101b, 101c, 201a, 201b, 201c; 401a, 401b, 401c, 501a, 501b, 501c), 35. 112106 π Method according to Claim 1, 2 or 3, characterized in that the connecting plates (3a, 3b) are arranged on parallel sub-grids (100a, 100b, 100c, 200a, 200b, 200c), in particular on extension joints (101a, 101b, 101c, 201a). , 201b, 201c), the notches (7a, 7b) arranged between them. Method according to one of Claims 1 to 5, characterized in that the connection points (A) are protected by fire by upholstering them with a suitable strip (11). Method according to one of Claims 1 to 6, characterized in that the sub-structures (100, 200, 300) are manufactured separately at the factory or at a similar location and assembled into a wooden truss structure (1; 12; 13) for use in a construction site. Method according to Claim 7, characterized in that the connecting plates (3a, 3b) are fixed at the joining points (A; G) to one of the sub-structures (100; 500) and the interconnected sub-structures (100, 200; 400, 500) are assembled into a single wooden structure. ; 12; 13) at the building site. . . A lattice structure comprising at least two sub-structures (100, 200, 300; im · 15 400, 500), each sub-structure (100, 200, 300; 400, 500) consisting of at least two parallel sub-structures (100a) , 100b, 100c, 200a, 200b, 200c, 300a, 300b, 300c; 400a, 400b, 400c, 500a, 500b, 500c), characterized in that the sub-structures (100, ·. * ·· 200, 300; 400, 500 ) can be joined together to form a single lattice structure (1; 12, ·: *: 13) of a plurality of junctions (A, B, C, D, E, F; G, H, I; K, L) with connecting plates (3a, 3b), -: T: 20 ka are adjustable between and attached to parallel sub-grids (100a, 100b, 100c; 400a, 400b, 400c, 500a, 500b, 500c). A wooden truss structure according to claim 9, characterized in that - the sub-structures (100, 200, 300; 400, 500) are made of wood material such that: · 25 they consist of at least two parallel sub-trusses (100a, 100b, 100c, 200a, 200b, 200c, 300a, 300b, 300c; 400a, 400b, 400c, 500a, 500b, 500c) including extension joints (101a, 101b, 101c, 201a, 201b, 201c; 401a, 401b, 401c, 501a) , 501b, 501c), - the connecting plates (3a, 3b) are adaptable to the junctions (A, B, C, D, E, F; G, H, I; K, L) 30 parallel sub-grids (100a, 100b, 100c, 200a) , 200b, 200c, 300a, 300b, 300c; 400a, 400b, 400c, 500a, 500b, 500c) spacers (101a, 101b, 101c, 201a, 201b, 201c; 401a, 401b, 401c, 501a, 501b, 501c) such that they extend from one component structure (100; 400) to another (200; 500) and the I2 112106 connecting plates (3a, 3b) can be secured to the extension rods (101a, 101b, 101c, 201a, 201b, 201c; 401a, 401b, 401c) , 501a, 501b, 5 01c) with metal fasteners (4). A lattice structure according to claim 9 or 10, characterized in that at the junction (A), the first extension rods (lila, 111b, 111c) of the first sub-structure (100) are interconnected by the sub-lattice (200) of the second sub-structure (200). 200a, 200b, 200c) with the first splice bars (211a, 211b, 211c) such that the end portions of the splice bars overlap with each other. The lattice structure according to claim 9, 10 or 11, characterized in that the connecting plates (3a, 3b) are adaptable in parallel sub-lattices (100a, 100b, 100c, 200a, 200b, 200c, 300a, 300b, 300c; 400a, 400b, 400c). 500a, 500b, 500c), especially the slots (5a, 5b; 6a, 6b) between the joints (101a, 101b, 101c, 201a, 201b, 201c; 401a, 401b, 401c, 501a, 501b, 501c). A lattice structure according to claim 9, 10 or 11, characterized in that:. that the connecting plates (3a, 3b) are adaptable to the parallel sub-grids (100a, 100b, '· /. 100c, 200a, 200b, 200c), in particular the joints (101a, 101b, 101c, 201a, 201b,. notches (7a, 7b). A lattice structure according to any one of claims 9 to 13, characterized in that the connection points (A) are protected by fire by upholstering them with one or more strips (11). A lattice structure according to any one of claims 9 to 14, characterized in that the sub-structures (100, 200, 300) are manufactured separately at the factory or the like; in place and assembled to be used as a lattice structure (1; 12; 13) in the construction site. · ': A wooden lattice structure according to any one of claims 9 to 15, ·; ·· characterized in that the connecting plates (3a, 3b) are fastened to the joining points (A; G) in one part structure (100; 500) and the part structures (100, 200; 400, 500) to be joined together are assembled into a single wooden structure (1; 12; 13). ) on construction site-30 sa. A lattice structure according to any one of claims 9 to 16, characterized in that the connecting plates (3a, 3b) are made of metal, preferably steel. 112106 A lattice structure according to any one of claims 9 to 16, characterized in that the connecting plates (3a, 3b) are plywood. A lattice structure according to any one of claims 9 to 18, characterized in that the lattices (100a) are formed at least in part by extension joints (101a, 102a, 103a) which are joined together by nail plates (104a). A wooden structure according to any one of claims 9 to 19, characterized in that the wooden structure (1) is a roof support. A lattice structure according to any one of claims 9 to 19, characterized in that the lattice structure (12; 13) is comprised of a pillar part (500) formed by first sub-lattices (500a, 500b, 10 500c) and a roof sub-part (400a, 400b, 400c). ).